SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98e9fa7b37e04019c8d53d2627a4290ed579906a0a715e630528c2bc0f5b917f' 
  AND token = 'cp3feKzTOBZFHGFX31SqGKdhQC+66R8Z2MZT9V2Kle0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}